Thanks in advance for any help. Just put it all together 2 days ago (parts in profile) and it has been working like a dream. This morning I wake up, install MS Messenger and a new game then go out for a few hours for errands. I come home and now my computer won't boot up. Windows starts booting up, and at SOME point, it freezing. Sometimes during the bootup, sometimes I get all the way to seeing my desktop wallpaper. But eventually it locks up and I can't even contl-alt-del to get out. I went in in safe mode and did a roll back. Didn't fix the problem.